About DFI   Deep Foundations Institute (DFI) is an international non-profit association of contractors, engineers, suppliers, academics and owners in the deep foundations construction industry. Our multi-disciplinary membership creates a consensus voice and a common vision for continual improvement in the planning, design and construction of deep foundations and excavations. We bring together members through networking, education, communication and collaboration. With our members, we promote the advancement of the deep foundations industry through technical committees, educational programs and conferences, publication of guides and specifications, a peer-reviewed journal, a fl